Improved Light-Cone Sum Rules for the Electromagnetic Form Factors of the Nucleon

Details Improved Light-Cone Sum Rules for the Electromagnetic Form Factors of the Nucleon Improved Light-Cone Sum Rules for the Electromagnetic Form Factors of the Nucleon

2003-11-06

arxiv.org/abs/hep-ph/0311082v1

Phys.Lett. B581 (2004) 199-206

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 5 figures

Scientific paper

10.1016/j.physletb.2003.12.009

We calculate the electromagnetic form factors of the nucleon within the light-cone sum rule approach. In comparison to previous work (hep-ph/0112085) we suggest to use a pure isospin-1/2 interpolating field for the nucleon, since the Chernyak-Zhitnitsky current leads to numerically large, unphysical, isospin violating contributions. The leading-order sum rules are derived for the form factors and the results are confronted with the experimental data. Our approach tends to favor the nucleon distribution amplitudes that are not far from the asymptotic shape.

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